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PASSLOCK™ 30 Minute Relearn Procedure (Impala & Monte Carlo)

NOTE: 10 minute procedure requires special equipment to perform. If special equipment is not available, 30 minute procedure may be used. This procedure allows relearning of BCM or PCM learned data code after replacement of Passlock™ module, Passlock™ sensor or VCM. DTC B3031 will set when entering programming mode. Reprogram BCM with proper RPO configurations before performing 30 minute relearn procedure. After reprogramming a new PCM, PCM will learn incoming fuel continue password immediately. After initial password is learned, relearn procedure will have to be performed to change password.
  1. Clear all DTCs. See scan tool manufacturer's instructions. Turn ignition switch to OFF position. Replace component(s) as necessary.
  2. With transmission in Park (A/T) or Neutral (M/T), turn ignition switch momentarily to START position (engine will not start). Leave ignition switch in RUN position (engine off). After 10 minutes, when SECURITY light turns off, turn ignition switch to OFF position for 5 seconds.
  3. Repeat step  2 twice more. Turn ignition switch to OFF position. Auto learn procedure will be completed during next start attempt. Clear all DTCs.
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